EP2149780A3 - Optical projection grid, scanning camera comprising an optical projection grid and method for generating an optical projection grid - Google Patents

Optical projection grid, scanning camera comprising an optical projection grid and method for generating an optical projection grid Download PDF

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Publication number
EP2149780A3
EP2149780A3 EP09167045.5A EP09167045A EP2149780A3 EP 2149780 A3 EP2149780 A3 EP 2149780A3 EP 09167045 A EP09167045 A EP 09167045A EP 2149780 A3 EP2149780 A3 EP 2149780A3
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EP
European Patent Office
Prior art keywords
optical projection
projection grid
structures
generating
projection grating
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP09167045.5A
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German (de)
French (fr)
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EP2149780A2 (en
Inventor
Andreas Faulstich
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sirona Dental Systems GmbH
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Sirona Dental Systems GmbH
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Filing date
Publication date
Application filed by Sirona Dental Systems GmbH filed Critical Sirona Dental Systems GmbH
Publication of EP2149780A2 publication Critical patent/EP2149780A2/en
Publication of EP2149780A3 publication Critical patent/EP2149780A3/en
Withdrawn legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/24—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures
    • G01B11/25—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures by projecting a pattern, e.g. one or more lines, moiré fringes on the object
    • G01B11/2513—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures by projecting a pattern, e.g. one or more lines, moiré fringes on the object with several lines being projected in more than one direction, e.g. grids, patterns

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  • Engineering & Computer Science (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)

Abstract

Die Erfindung betrifft ein optisches Projektionsgitter (1) zur Erzeugung einer Lichtverteilung, wobei das Projektionsgitter (1) eine Transmissionsverteilung aufweist, wobei die Transmissionsverteilung durch Teilbereiche (2a,2b,...2i), die lichtdurchlässige Strukturen (5) und lichtundurchlässige Strukturen (4) enthalten, gebildet ist. Innerhalb eines Teilbereichs (2a,2b,2c,2d,2e,2f,2g,2h,2i) sind mehrere Strukturen jeder Art verteilt, insbesondere im wesentlichen unzusammenhängend und einander abwechselnd, wobei das Verhältnis von lichtdurchlässigen Strukturen (5) zu lichtundurchlässigen Strukturen (4) innerhalb eines Teilbereichs (2a,2b,...2i) so gewählt ist, dass ein dem Teilbereich (2a,2b,...2i) zugeordneter Transmissionswert (Ta,Tb,...Ti) zumindest in einem statistischen Mittel erreicht wird. Die Erfindung betrifft auch eine Messkamera mit einem optischen Projektionsgitter und ein Verfahren zur Erzeugung eines optischen Projektionsgitters.

Figure imgaf001
The invention relates to an optical projection grating (1) for generating a light distribution, wherein the projection grating (1) has a transmission distribution, wherein the transmission distribution through partial regions (2a, 2b,... 2i), the light-permeable structures (5) and opaque structures (FIG. 4) is formed. Within a partial region (2a, 2b, 2c, 2d, 2e, 2f, 2g, 2h, 2i), a plurality of structures of each type are distributed, in particular substantially discontinuous and alternating, the ratio of light-transmitting structures (5) to opaque structures (FIG. 4) is selected within a partial region (2a, 2b,... 2i) such that a transmission value (T a , T b ,... T i ) assigned to the partial region (2 a, 2 b , a statistical mean is achieved. The invention also relates to a measuring camera with an optical projection grating and to a method for producing an optical projection grating.
Figure imgaf001
EP09167045.5A 2008-08-01 2009-08-03 Optical projection grid, scanning camera comprising an optical projection grid and method for generating an optical projection grid Withdrawn EP2149780A3 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102008040949A DE102008040949B4 (en) 2008-08-01 2008-08-01 Optical projection grating, measuring camera with optical projection grating and method for producing an optical projection grating

Publications (2)

Publication Number Publication Date
EP2149780A2 EP2149780A2 (en) 2010-02-03
EP2149780A3 true EP2149780A3 (en) 2014-06-11

Family

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Family Applications (1)

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EP09167045.5A Withdrawn EP2149780A3 (en) 2008-08-01 2009-08-03 Optical projection grid, scanning camera comprising an optical projection grid and method for generating an optical projection grid

Country Status (3)

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US (1) US20100026963A1 (en)
EP (1) EP2149780A3 (en)
DE (1) DE102008040949B4 (en)

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US11493998B2 (en) 2012-01-17 2022-11-08 Ultrahaptics IP Two Limited Systems and methods for machine control
US9501152B2 (en) 2013-01-15 2016-11-22 Leap Motion, Inc. Free-space user interface and control using virtual constructs
US9070019B2 (en) 2012-01-17 2015-06-30 Leap Motion, Inc. Systems and methods for capturing motion in three-dimensional space
US8693731B2 (en) 2012-01-17 2014-04-08 Leap Motion, Inc. Enhanced contrast for object detection and characterization by optical imaging
US10691219B2 (en) 2012-01-17 2020-06-23 Ultrahaptics IP Two Limited Systems and methods for machine control
JP5842694B2 (en) * 2012-03-21 2016-01-13 セイコーエプソン株式会社 Image processing apparatus, projector, and projector control method
US10406658B2 (en) * 2012-04-30 2019-09-10 Jeffrey Dean MacDonald Open-ended ratchet wrench
US9285893B2 (en) 2012-11-08 2016-03-15 Leap Motion, Inc. Object detection and tracking with variable-field illumination devices
US8905757B2 (en) 2012-12-03 2014-12-09 E. Kats Enterprises Ltd. Method and apparatus for measuring a location and orientation of a plurality of implants
US10609285B2 (en) 2013-01-07 2020-03-31 Ultrahaptics IP Two Limited Power consumption in motion-capture systems
US9465461B2 (en) 2013-01-08 2016-10-11 Leap Motion, Inc. Object detection and tracking with audio and optical signals
US10241639B2 (en) 2013-01-15 2019-03-26 Leap Motion, Inc. Dynamic user interactions for display control and manipulation of display objects
US9459697B2 (en) 2013-01-15 2016-10-04 Leap Motion, Inc. Dynamic, free-space user interactions for machine control
US9702977B2 (en) 2013-03-15 2017-07-11 Leap Motion, Inc. Determining positional information of an object in space
US10620709B2 (en) 2013-04-05 2020-04-14 Ultrahaptics IP Two Limited Customized gesture interpretation
US9916009B2 (en) 2013-04-26 2018-03-13 Leap Motion, Inc. Non-tactile interface systems and methods
US9747696B2 (en) 2013-05-17 2017-08-29 Leap Motion, Inc. Systems and methods for providing normalized parameters of motions of objects in three-dimensional space
DE102014104993A1 (en) 2013-06-24 2014-12-24 Qioptiq Photonics Gmbh & Co. Kg Dental measuring device for the three-dimensional measurement of teeth
US10281987B1 (en) 2013-08-09 2019-05-07 Leap Motion, Inc. Systems and methods of free-space gestural interaction
US9721383B1 (en) 2013-08-29 2017-08-01 Leap Motion, Inc. Predictive information for free space gesture control and communication
US9632572B2 (en) 2013-10-03 2017-04-25 Leap Motion, Inc. Enhanced field of view to augment three-dimensional (3D) sensory space for free-space gesture interpretation
US9996638B1 (en) 2013-10-31 2018-06-12 Leap Motion, Inc. Predictive information for free space gesture control and communication
US9613262B2 (en) 2014-01-15 2017-04-04 Leap Motion, Inc. Object detection and tracking for providing a virtual device experience
DE202014103729U1 (en) 2014-08-08 2014-09-09 Leap Motion, Inc. Augmented reality with motion detection
US10429923B1 (en) 2015-02-13 2019-10-01 Ultrahaptics IP Two Limited Interaction engine for creating a realistic experience in virtual reality/augmented reality environments
US9696795B2 (en) 2015-02-13 2017-07-04 Leap Motion, Inc. Systems and methods of creating a realistic grab experience in virtual reality/augmented reality environments
US11875012B2 (en) 2018-05-25 2024-01-16 Ultrahaptics IP Two Limited Throwable interface for augmented reality and virtual reality environments
US10986328B2 (en) 2018-06-08 2021-04-20 Dentsply Sirona Inc. Device, method and system for generating dynamic projection patterns in a camera
US11467556B2 (en) 2019-09-04 2022-10-11 Honda Motor Co., Ltd. System and method for projection of light pattern on work-piece

Citations (3)

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Publication number Priority date Publication date Assignee Title
DE4436500A1 (en) * 1993-10-26 1995-05-11 Zeiss Carl Jena Gmbh Optical projection grating
US20060083422A1 (en) * 2004-01-27 2006-04-20 Ernst Maurice M Three-dimensional modeling of the oral cavity
DE102005018656A1 (en) * 2005-04-21 2006-11-02 GOM - Gesellschaft für Optische Meßtechnik mbH Projector for an arrangement for the three-dimensional optical measurement of objects

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GB1490908A (en) * 1974-10-18 1977-11-02 Inductosyn Corp Member of a position measuring transducer and a method of making same
US5372502A (en) * 1988-09-02 1994-12-13 Kaltenbach & Voight Gmbh & Co. Optical probe and method for the three-dimensional surveying of teeth
DE3829925C2 (en) * 1988-09-02 1994-03-03 Kaltenbach & Voigt Device for the optical measurement of teeth in the oral cavity
JP4027512B2 (en) * 1998-09-29 2007-12-26 フジノン株式会社 Pattern projection measurement grid
US6937348B2 (en) * 2000-01-28 2005-08-30 Genex Technologies, Inc. Method and apparatus for generating structural pattern illumination
US20050244078A1 (en) * 2004-04-28 2005-11-03 Simon Magarill Photographic slides having specified transmission functions
US8150142B2 (en) * 2007-04-02 2012-04-03 Prime Sense Ltd. Depth mapping using projected patterns

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4436500A1 (en) * 1993-10-26 1995-05-11 Zeiss Carl Jena Gmbh Optical projection grating
US20060083422A1 (en) * 2004-01-27 2006-04-20 Ernst Maurice M Three-dimensional modeling of the oral cavity
DE102005018656A1 (en) * 2005-04-21 2006-11-02 GOM - Gesellschaft für Optische Meßtechnik mbH Projector for an arrangement for the three-dimensional optical measurement of objects

Also Published As

Publication number Publication date
DE102008040949B4 (en) 2012-03-08
DE102008040949A1 (en) 2010-02-11
US20100026963A1 (en) 2010-02-04
EP2149780A2 (en) 2010-02-03

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